HP C30 - Macintosh Communication Port to Printer; RS-422 Host Interface

Host Interface Reference
6-26 Wiring Diagrams and Electrical Data June 1999
Macintosh Communication Port to Printer
Normally, the Macintosh comes with a 9-pin male connector.
RS-422 Host interface
The RS-422 host interface uses the signal definitions defined below. A shielded cable is
required with the shield connected on one end only, preferably at the printer end.
Table 6-7. Macintosh Communication Port to Printer Connector Wiring
Macintosh
Signal DCE DTE
Printer
Signal
FG 1 1 FG
22TD
SG 3 3 RD
44RTS
TD 5 5 CTS
6 6 ------
DSR 7 7 SG
8 8 DCD
RD 9 20 DTR
Table 6-8. RS-422 Host Interface Connector Wiring
Host
Signal
Printer
Signal
GND 1 1 FG
SG 8 8 SG
TD
22
TD
99
RD
44
RD
11 11
DCD
55
DCD
12 12
ST2
66
ST2
13 13
ST1
77
ST1
14 14
DTR
33
DTR
10 10